Roller crushing-mill.



No. 777,591. PATENTED DEC. 13, 1904. IVI. P. BOSS.

ROLLER ORUSHING MILL.

APPLICATION FILED SEPT. 13. 1902.

N0 'MODEL i 1 mum NiTnn STATES Patented December 13, 1904:.

PATENT OFFICE.

IFROLLEH @RUSHING-NULL,

SPECIFICATION forming' part 0f Letters Patent N0. 777,591, dated December 13, 1904.

' Application filed September 13, 1902. Serial No. 123,246. (No model.)

To all whom t may concern:

Be it known that I, MARTIN Pinon Boss, a citizen of the United States, residing in the city and county of San Francisco,pStatc of California, have invented certain new and useful Improvements in Roller Orushing-iviills; and I do hereby declare the following' to be a full. clear, and exact description of the same.

My invention relates to that class of crushing-rnills commonly known as centrifugal mills, in which freely-swinging rolls suspended from a driver are carried around thereby Within a pan and are caused by the centrifugal force of their revolution to swing' outwardly against a ring-die in the pan and to crush the material between their shoes and said die.

My invention has for its object the provision of a self-contained mill of this class in which the construction and arrangement of the parts conduce to economy in manufacture, durability and effectiveness in operation, and facility in adjustment and interchangeability as the occasion may require; and to these ends my invention consists in the novel construc- -tions and combinations which I shall hereinafter fully describe and claim by reference to the accompanying' drawings, in which Figure l isa top view of the mill, a portion of the pan and base being broken away to show the adjustable directing-pu l le y for the driving* beit. Fig'. 2 is a vertical section of the mill on the line :11 reef Fig. 1 looking' in the direction of the arrow. Fig. 3 an enlarged vertical section showing the support for the roller from the outer end of the roller-arm and showing the means for holding the shoe or wearing-ring on the roller. Fig. 4t is a cross-section, partly broken, on the line 2/ v/ of Fig'. 3, looking downward, as indicated by the arrow. Fig. 5 is an enlarged vertical section showing' the roller-arm support from the driver-arm. p

Fig'. 6 is an enlarged detail of the button for holding down the roiler-arm in the driver-arm and releasing the same.

In Figs. l and 2, A is the circular pan supported upon a circular base B. In the pan is the ring-die a, and rising from its center is the bearing a for the driving-shaft O, which is suitably stepped below at c. The circular base y', Fig. 3, to draw down the bolts J. 7" on the bolt is made eXtra large and 1s seated.

B is left open at two sides, as shown in Fig. 2, one opening being to afford access to the .interior and the other to admit the driving'- belt. (Not shown.) rI his belt is a quarterturn belt from the exterior to the drivingpulley c' on shaft C, and in order to properly direct and adjust this belt to the requirements of the case it is guided to the pulley c by a directing-pulley D. (Seen in Fig'. l.) This directing-pulley is carried by a yoke d, having its base (Z rotatable upon adisk 7), cast on the base B and adjustably secured thereto by a king-bolt (l2, whereby thc pulley may be ad-i Iiusted to the proper inclination for the quar-V terturn driving-belt.

rFhe pan A is provided with the usual screens c2, Fig. 2. Upon the upper end of the shaft O is fixed the driver E. This has radiating arms e, the outer end of each of which is bored to receive a sleeve F, as shown in Figs. 2 and 5. rIhis sleeve is turned to ina-lie a driving' iit in the arm-socket, so that it is lixed therein.

G in Figli represents the swinging roller carrying-arms. `Each consists of a top piece litted at the driver-arm end with a downwardly-extending shaft g, Fig. 5, and at the outer or free end with a downwardly-extending shaft y, Fig. 3. Both shafts are keyed in, as shown in Figs. 3 and 5. The shaft g of the rollerarm iits down in the sleeve F, which forms a journal for it, as shown in Fig. 5, and the bottom of the sleeve is formed with a step 7" to support the weight of the yoke and the roller. The shaft y' .in the other or free end of the roller-arn1 has a collar g2 upon it, Fig'. 3, which supports the top connection of the tubular stem /t' of the roller H, by which the latter depends. ',lhe roller I-I, as is shown in Fig. 3, is provided with a tapering shoe or wearing-ring This shoe is held down by a follower-plate I, which is mounted loosely on the tubularstem/t of therol'ierll. Theouter edge of the follower-plate is bent downwardly to engage the upper edge of the shoe In practice these slices stretch larger as they Wear, and I therefore provide spiral springs The nut in a square socket flf, cast in the roller, and the spring y operates against the nut. To

tighten the shoe on the roller, the bolts .I are screwed down by the head. To prevent selfturning, a yielding ring K, preferably of rubber,-Figs. 3 and 4, is pushed down over the stem /L to catch the heads of the bolts J.

It will be seen that by the use of the peculiarly-shaped follower-plate I the shoe if will be held tightly in engagement with the roller H even after the shoe has become worn to such an extent that its upper edge is below top of the roller, as the downwardly-bent edge of said plate would still bear on the top edge of said shoe and force the same tightly upon the roller until the shoe becomes so worn that the body portion of the follower-plate rests upon the top of the roller.

In order to hold the roller-arm down in the arm and to release it when required, there is a button L, Figs. l, 2, and 6, seated and turnable in the driver-arm. This button overlaps a flange g3 of the roller-arm Gr, as seen clearly in Fig. 6, and said button hasastraight side, (seen clearly in Fig. 1,) which when turned toward the flange g3 entirely frees the roller-arm, so that to remove the latter it is only necessary to turn the button.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a roller crushingmill,the combination of a driver having a spider-arm, a roller carrying-arm, a pivotal connection between the driver-arm and the roller-arm comprising a detachable sleeve secured in the arm and a shaft secured in the roller-arm and journaled in said sleeve and the turn-button on the driverarm for holding the roller-arm down and releasing it when required.

2. In a roller crushing-mill, the combination of a driver having an armprovided with a depending sleeve removably secured in its extremity, a roller-arm having a shaft secured at one end thereof and supported in said sleeve, said roller-arm having a flange encircling the upper end of the sleeve, and the turnable buttou on the driver-arm adapted to engage with the upper surface of the flange of the roller-arm, for holding' said arm down, and for releasing it when required.

3. In a roller crushing-mill, the combination of a driver having an arm with a detachable sleeve secured in its extremity, a roller-arm having a. shaft secured at one end and journaled in said sleeve, said shaft being stepped in the bottom of the sleeve,\vhereby the roller-arm is supported therein, 'said roller-arm having a shaft secured in its other end with a bearing for a crushing-roller, and a crushing-roller depending from said bearing.

4. In a roller crushing-mill the combination of the roller having a tubular stem by which it is suspended, a tapering shoe on the roller, a follower-plate slidably mounted on the tubular stem of the roller, the outer edge of said follower-plate being bent downwardly to engage the edge of the tapering shoe, and means for adjustably securing the follower-plate to the roller.

5. In a roller crushing-mill, the combination ofthe roller, the tapering shoe thereon, the follower-plate bearing upon and holding the shoe down. bolts securing the follower-plate to the roller, and the springs on the bolts seated in sockets in the roller.

6. In a roller crushing-mill the combination of the roller having a tubular stem by which it is suspended, the tapering shoe on the roller, the follower-plate fitted around the stem and bearing upon and holding the shoe down, the bolts for connecting and tightening the follower-plate to the roller and the yielding ring fitted around the roller-stem and engaging the bolt-heads.

7. In a roller crushing-mill, the combination of a driver having an arm provided with a depending sleeve secured in its extremity, and a roller-arm having a shaft secured at one end thereof and supported in said sleeve and a flange encircling the upper end of said sleeve. 8. In a roller crushing-mill, the combination of adriver, a roller-arm pivoted to said driver having a depending shaft secured in its extremity provided with a collar near its upper end` and a J[lange encircling said shaft near its upper end, a roller having a tubular stem receiving said shaft and formed with an internal shoulder below the collar of the shaft and internally threaded above said collar, and a connecting member threaded into the tubular stem above the collar of the shaft and extending up into the space inclosed by the flange of the roller-arm and provided with an external shoulder engaging the upper edge of the stem.

In witness whereof I have hereunto set my hand.

MARTIN PRIOR BOSS. Witnesses:

A. D. BARNHART, THos. D. ROBINSON.

IOO 

